.nav_container{
    width: 200px;
    height: 498px;
    border-radius: 5px;
    border: 1px solid #e7e7e7;
    float: left;
}
.nav_container_head{
    height: 30px;
    border-radius: 5px;
    border:1px solid #a9a9a9;
    text-align: center;
    width: 100%;
}
.nav_container_content{
    position: relative;
    padding-top: 10px;
    width: 100%;
}
#myTabs{
    text-align: center;
    width: 100%;
}
#myTabs li{
    height: 35px;
    border: 1px solid #dcdcdc ;
    background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, #ffffff), color-stop(1,#dcdcdc)); /*Chrome*/
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff', endColorstr='#dcdcdc', GradientType=0);
    width: 100%;
    font-size: 13px;
    color: cadetblue;
}